Geometry Puzzle

1234567891011121314151617
Across
  1. 3. an angle in a circle with its vertex on the circle
  2. 7. a line segment that has both endpoints on a circle
  3. 8. has four sides, four corners, and four right angles with opposite sides parallel and equal
  4. 10. quadrilateral that has both pairs of opposite sides parallel and equal
  5. 12. a triangle whose all three sides have different lengths, and all three angles are of different measures
  6. 13. a quadrilateral whose four sides can be grouped into two pairs of equal-length sides that are adjacent to each other
  7. 15. a trapezoid in which the top and bottom sides are parallel, while the remaining two non-parallel sides have the same length
  8. 17. a triangle with two equal sides
Down
  1. 1. longer arc connecting two endpoints on a circle
  2. 2. shorter arc connecting two endpoints on a circle
  3. 4. four-sided regular polygon with four equal angles and sides and is also a parallelogram
  4. 5. all five sides are equal in length and all five angles have an equal measure
  5. 6. an angle in a circle with its vertex at the center of the circle
  6. 7. a round-shaped figure that has no corners or edges
  7. 8. a quadrilateral with both pairs of opposite sides parallel and all sides the same length
  8. 9. all six sides are equal in length and all six angles have an equal measure
  9. 10. represented by a dot that has no width, length, or height
  10. 11. a triangle with all three sides of equal length
  11. 14. a point at or near the center or middle
  12. 16. lines 2 pair of lines that never intersect each other